I will be sort of mad if Daniel wins, not because I don't like him but he has never really shown any real competence in the whole of the show. He has been more of a hindrance on a lot of tasks rather than a help.
I want Roisin to win though, she has been incredible throughout the show and has always been an asset to the team. She is a good project manager but the only think I would worry about is that I don't feel like she really has a commanding voice, people don't naturally just follow her.
I think she will also be a bit too cautious when it comes to business. Not that prudence isn't a good thing in Business but sometimes you have got to take risks which I don't think Roisin will find easy and will maybe make LS think twice about her.
If not Roisin, then Mark (or possibly Solomon) is my go to choice. Good sales man, seems to be confident in his business plan, seems to know what he is talking about and generally seems to be an easy person to get along with.